Installation Instructions Specifications are subject to change without notice Page 1
Through Roof Fan Cowls and Fan Kits
ELECTRICAL CONNECTION
NOTE: Junction box supplied is suitable for internal use and below roof installation (inside the building)
• Cut the roof flashing on the 150/160 marking and fit to the rigid duct before commencing (see separate
installation sheet detailing this).
• For below roof terminations the motor lead exit hole should be as far down the rigid duct as is practical –
allow enough lead to protrude from the duct as is required for termination. After fitting the roof flashing, drill
an 8mm hole at a suitable point in the rigid duct and fit the supplied rubber grommet. The motor lead can
then be passed through the grommet to the outside of the rigid duct.
• The assembly can now be placed in position in the roof penetration (see instructions on page 3). Once the
assembly has been fastened to the roof by the roof flashing fastening procedure, the electrical connections
can be made. The junction box can be fastened to the rigid duct if necessary.
Junction box is supplied for the following cowls and kits with an inline axial EC fan:
FAN0531 / FAN0532 / FAN0533 / FAN0534 / FAN0739 / FAN1009 / FAN1060 / DCT0189
Junction box is supplied for the following cowls and kits with an inline centrifugal fan:
FAN0529 / FAN0530 / FAN0535 / FAN0740 / FAN0967 / FAN1002
• You may find it more convenient to pull the whole assembly down as far as possible in the roof flashing
to carry out the terminations (Fig 1). Once completed, the assembly can then be pushed back up through the
Dektite. Ensure that a visual check is made above the roof afterwards to check that the roof flashing is sealing
correctly around the rigid duct (Fig 2). Once the terminations are completed the rigid duct can then be
fastened to a rafter or purlin with the supplied clamp for rigidity. Ducting connections can then be made.
• Precautions must be taken to avoid the back-flow of gases into the room from the open flue of gas or other
fuel-burning appliances.
Please ensure these instructions are read thoroughly before commencing installation
and that all documentation is left with the home owner on completion of installation
CAUTION
• Before use, please check that the supply voltage and that of the appliance are the same (see product rating label).
• All wiring and wiring connections must comply with national wiring rules and regulations.
• Any changes or modifications made or attempted to this product, without the prior written approval of the manufacturer, will void any and all
stated warranties.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they are capable of, and have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• In case of damage to the supply cord, switch off the device and do not tamper with it. Damaged supply cords must only be repaired or
replaced exclusively by the manufacturer or by an appointed representative. Failure to comply with the above may endanger the safety of
people and cause possible damage to the whole system.
• Precautions must be taken to avoid the back-flow of gases into the room from the open flue of gas or other fuel-burning appliances.
Fig 1
Fig 2
TECHNICAL
Duct
(mm) Fan Type
Max.
Fan Watts
(W)
Max.
Fan Pressure
(Pa)
Free Air Fan
Performance
Specific
Fan Power
(W/l/s)
Sound
dB(A) Switching
(l/s) (m3/hr)
150 Centrifugal 70 320 153 550 0.46 62 Standard
150 EC Axial 18 91 105 380 0.17 38 Standard
Installation Instructions Specifications are subject to change without notice Page 2
Through Roof Fan Cowls and Fan Kits
REGULATIONS AND STANDARDS
Choosing the Right Fan to Comply
Fans cannot be selected on the basis of free-air performance only. Fans must now be selected on the basis of the complete installed system
performance for a designated room as per the table below.
1) Toilets only require ventilation if they have no openable windows
2) Simx recommends 40 l/s for laundries with unvented non-condensing tumble dryers as covered in AS 1668: Part 2 2012
Recent unregulated extract fan practices in New Zealand has trended to basic, low pressure axial fan products, as installed system performance has
not been defined for independent inspection testing and compliance signed off by local authorities.
New Zealand Building Code and Healthy Homes
The following two category requirements have been established for mandatory extraction ventilation in New Zealand.
The New Zealand Building Code for New Building Consents
The building regulatory system sets out a framework to promote good quality decisions being made during the Building Consent process. The
legislation and regulations work together, as the building regulatory system. The functional clauses of the NZ Building Code are grouped and
described by a letter and number. Clause G of the NZ Building Code covers services, with G4 setting out the performance requirements for
ventilation. The Building Code is enshrined in law. The New Zealand Building Code, G4, has been changed. This is supported by Acceptable Solution
G4/AS1 Fourth Edition that specifies mechanical ventilation in accommodation units that contain cooktops, showers and baths.
Residential Tenancy Regulations to the Healthy Homes Standards
Residential Tenancy Regulations for rental properties only is changing to the Healthy Homes Standards, sub part 4 - Ventilation Standards.
Complying with the Acceptable Solution G4/AS1
To comply, the mandatory mechanical extract system must deliver minimum airflow rates for the complete installed ventilation system. This means
that airflow rates must deliver the airflow after resistance of the ducting, internal and external grilles, as well as all other accessories, such as
backdraught shutters, are included.
Fan selection is important as some types are far better at overcoming ducting system pressure drops.
Additionally, the quality of the ducting system installation can be all important. Rigid duct systems (see page 102) are best as they are the most
efficient. Good installation practice is vital for flexible duct systems.
Room Airflow Rate (min.)
Intermittent Continuous
Toilet1) 25 l/s 10 l/s
Bathroom/shower 25 l/s 10 l/s
Laundry2) 40 l/s -
Kitchen 50 l/s 12 l/s
Duct Supports
Exterior Grille
Airflow
Airflow
Interior Grille
Sealant Cavity
Sleeve
Maximum length of
flexible ducting
Minimum radius =
diameter of ducting
Bathroom Kitchen
25 l/s Metres of Ducting 50 l/s Metres of Ducting
1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10
No. of
Bends
1
No. of
Bends
1
2 2
3 3
4 4
5 5
Fan Selection
Hyper150 EC Mixflo 150 Blue Jet
Preferred flexible
ducting route
Peaks and troughs
Restrictions
Installation Instructions Specifications are subject to change without notice Page 3
Through Roof Fan Cowls and Fan Kits
For inline axial EC fan models (no capacitor):
FAN0531 / FAN0532 / FAN0533 / FAN0534
FAN0739 / FAN1009 / FAN1060 / DCT0189
For inline centrifugal (3 speed) fan models:
FAN0967
For inline centrifugal fan models:
FAN0529 / FAN0530 / FAN0535 / FAN0740
Motor
P
N
E
Brown
Blue
Green/Yellow
Red
Blue
Green/Yellow
P
N
E
2.0 F
CAP
Motor
White
SP3/P
SP2/P
SP1/P
N
E
White (3)
White (2)
White (1)
White (4)
Green/Yellow
Motor
2.0 F
CAP
SP3/P
SP2/P
SP1/P
N
E
Black
Brown
White
Blue
Green/Yellow
Motor
2.0 F
CAP
For inline centrifugal (3 speed) fan models:
FAN1002
Fasten tube to roof truss or rafter using clamp bracket supplied.
Tube/cowl must be mounted vertically to ensure weatherproofing
Fix diffuser to ceiling and fasten ducting. If screw-fixing diffuser is
supplied cut 153mm diameter hole. If diffuser is type with spring
loaded self-latching clip fasteners cut 205mm diameter hole.
Make electrical connections below roof
Flexible ducting connects directly to the
bottom of rigid duct. Cut any excess
length of ducting off before connecting.
WIRING CONNECTIONS
White (5)
White (6)
Connect SP3/SP2/SP1 to single phase (P)
for High/ Medium/ Low speed control
Connect SP3/SP2/SP1 to single phase (P)
for High/ Medium/ Low speed control
Violet
Grey
TYPICAL INSTALLATION
Installation Instructions Specifications are subject to change without notice Page 4
Through Roof Fan Cowls and Fan Kits
PUB1545 2105
INSTALLATION
Cut the pliable roof flashing sleeve where indicated on the sleeve for the relevant tube size: 150/160mm
Slide the roof flashing down over the tube. Water can be used as a lubricant.
Position the top end of the tube into the cowl.
The top edge should sit 20mm inside the cowl.
Drill through the three pilot holes and screw the cowl to the tube.
You can now proceed to the actual roof installation.
Cut a neat hole in the roofing material with minimal clearance for the tube.
Insert the tube through the hole.
Apply a neutral cure silicon sealant on the underside of the flange.
Turning the flexible flange back makes this simple.
Press the roof flashing into the contours of the roof configuration.
Fasten the roof flashing to the roof using the screws supplied (Hex/slot head - 10 pcs).
Drill a 5mm clearance hole in the flange for each screw.
The screws can be driven into the roof without the need for a pilot drill hole, or use a 2.5mm drill.
Fit the fasteners progressively outward in opposing pairs to avoid gaps.
Do not use unapproved fasteners (check roofing manufacturer recommendations).
Screws supplied are: AS3566.1 1990 Class 3
In certain applications it may be advantageous to install the flashing on the diamond or bias.
This particular installation method is especially suitable when having to seal enlarged holes, for penetrations
on steep pitched roofs.
Screws
Roof
Flashing
Tube
Aluminium
Cowl
FAN TIMER SELECTION
Please use the FAN2444 fan timer model shown Do not use old model FAN2444 (with resistor) or either FAN0372 fan timers shown
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